Cylindrical Spiral Brush For Egg Washing Machine

Cylindrical Spiral Brush for Egg Washing Machine

Design and Construction

The brush consists of a stainless‑steel or food‑grade polymer core wound with a continuous spiral of bristles. The spiral pitch is engineered to create a helical flow that lifts contaminants from the egg surface while minimizing mechanical stress on the shell.

Bristle filaments are typically nylon‑6,6 or polypropylene, selected for their resistance to hot water, detergents, and repeated flexing. Filament diameter ranges from 0.20 mm to 0.35 mm, providing enough stiffness to dislodge debris yet sufficient softness to avoid micro‑cracking.

Core tubes are available in 304 stainless steel for high‑temperature cycles or in FDA‑compliant polypropylene for lower‑cost, lightweight designs. Both options are seamless to prevent crevices where bacteria could harbor.

Performance Characteristics

When installed in an egg washing line, the spiral geometry generates a tangential velocity component that enhances scrubbing action without increasing radial load on the washing nozzles. This results in a 15 % to 20 % improvement in soil removal compared with straight‑bristle rollers at the same line speed.

Thermal stability allows continuous operation at water temperatures up to 85 °C, and the bristle material retains >90 % of its tensile strength after 500 h of exposure to alkaline cleaning agents (pH ≈ 11).

Rotational speeds up to 300 rpm are sustainable; beyond this point centrifugal forces may cause bristle flare, which is why the recommended operating window is 180 – 250 rpm for most commercial washers.

Typical Applications

Egg washing machines require a cleaning medium that removes fecal matter, feathers, and cuticle residues while preserving the integrity of the shell’s cuticle layer. The cylindrical spiral brush meets this need by delivering a controlled, sweeping action that agitates the wash fluid without imposing abrasive impacts.

Because the brush contacts the egg only along the tip of each filament, the pressure distribution is uniform and peak pressures stay below 0.02 MPa, a level shown in studies to maintain cuticle coverage above 95 % after washing.

The design also facilitates easy drainage; the spiral channels guide spent water and loosened particles toward the machine’s discharge ports, reducing the chance of re‑deposit.

Technical Specifications

Parameter	Typical Value	Notes / Options
Overall Diameter	50 mm – 150 mm	Customizable per machine shaft
Effective Length	100 mm – 600 mm	Determined by washing zone
Spiral Pitch	2 mm – 6 mm	Affects fluid agitation
Bristle Material	Nylon‑6,6 / Polypropylene	Stainless‑steel tip available
Bristle Diameter	0.20 mm – 0.35 mm	Influences stiffness
Core Material	304 Stainless Steel / FDA‑PP	Seamless construction
Operating Temperature	Up to 85 °C	Continuous duty
Maximum RPM	300 rpm	Recommended 180‑250 rpm
Food Contact Compliance	FDA 21 CFR 177.2600	Available upon request

Customization Options

Diameter and length tailored to specific egg washer models
Bristle material selection: nylon‑6,6, polypropylene, or stainless‑steel tipped filaments
Spiral pitch adjustment to match fluid viscosity and line speed
Core material choice between 304 stainless steel for high‑temp cycles or lightweight FDA‑PP
Surface finish options: passivated stainless steel or antimicrobial polymer coating
Mounting features: keyway, set‑screw collar, or quick‑release flange

Quality Assurance

Every brush undergoes dimensional verification using laser scanning to confirm outer diameter, length, and spiral pitch within ±0.1 mm tolerances. Bristle adhesion is measured by a pull‑test fixture; acceptance requires a minimum force of 5 N per filament before any slippage.

Material certificates are supplied for core and filament resins, confirming compliance with FDA food‑contact regulations. Visual inspection under 10× magnification checks for defects such as missing bristles, core deformation, or surface contamination.

Final performance validation includes a dynamic wash test on a representative egg sample; the brush must achieve a minimum soil removal efficiency of 85 % under standardized conditions.

Frequently Asked Questions

Can the brush dimensions be customized?: Yes, diameter, length, and spiral pitch are adjusted according to the washing machine’s shaft size and process requirements.
What materials are available for the bristles?: Standard options are nylon‑6,6 and polypropylene; stainless‑steel tipped filaments are offered for abrasive environments.
How is quality inspected before shipment?: Each unit is laser‑measured, pull‑tested for bristle adhesion, and visually examined; material certificates are provided with every order.
What packaging methods protect the brush during transit?: Brushes are wrapped in protective polyethylene sleeves, placed in rigid cardboard cartons with corner protectors, and sealed with moisture‑barrier liners for overseas shipments.